Just found a dratini. Want to know how? Sanchez told me to buy the 75k rod, after fishing 10m with it a dratini appear. 20m later another dratini. Looks like the rod is the problem in that specific poke(surfing a lot and 0 dragonairs).
So many hours with the 15k rod wasting the time.
Still, the rates of absol, pineco, froakie, riolu, houndour( 6 o 7 full game nights before 1 appear= +8h real time), and many other pokes is just insane, 1-2% is fine.